update transport function to make it more consistent with winston3

README.md

@@ -40,6 +40,7 @@ const options = {
     mac: macAddress,
     app: appName,
     env: envName,
+    level: level, // Default to debug, maximum level of log, doc: https://github.com/winstonjs/winston#logging-levels
     index_meta: true // Defaults to false, when true ensures meta object will be searchable
 };
 
@@ -48,16 +49,18 @@ options.handleExceptions = true;
 
 logger.add(new logdnaWinston(options));
 
-let meta = {
-    data:'Some information'
-};
-logger.log('info', 'Log from LogDNA-winston', meta);
-logger.log('debug', 'Log from LogDNA-winston', meta);
-logger.log('warn', 'Log from LogDNA-winston', meta);
-logger.log('error', 'Log from LogDNA-winston', meta);
-logger.info('Info: Log from LogDNA-winston', meta);
-logger.warn('Warn: Log from LogDNA-winston', meta);
-logger.error('Error: Log from LogDNA-winston', meta);
+
+// log with meta
+logger.log({
+    level: 'info'
+    , message: 'Log from LogDNA-winston'
+    , index_meta: true // Ignore this if you would like to use default setting
+    , data:'Some information' //  Properties besides level, message and index_meta are considered as "meta"
+    , error: new Error("It's a trap.") // Transport will parse the error object under property 'error'
+});
+
+// log without meta
+logger.info('Info: Log from LogDNA-winston');
 ```
 
 ## License

index.js

@@ -1,46 +1,38 @@
 const Transport = require('winston-transport');
-const logdna = require('logdna');
+const Logger = require('logdna').Logger;
 const stringify = require('json-stringify-safe');
 
+const DEFAULT_LEVEL = 'debug';
+const DEFAULT_NAME = 'LogDNA';
 /*
  *  Support for Winston Transport
  */
 module.exports = class LogDNATransport extends Transport {
     constructor(options) {
         super(options);
-        this.name = options.name || 'LogDNA';
-        this.level = options.level || '';
-        this.logger = new logdna.Logger(options.key, options);
+        this.name = options.name || DEFAULT_NAME;
+        this.level = options.level || DEFAULT_LEVEL;
+        this.logger = new Logger(options.key, options);
         this.index_meta = options.index_meta || false;
     }
 
     log(info, callback) {
-        setImmediate(() => this.emit('logged', info));
+        info = info || {};
 
-        if (info.message instanceof Error) {
-            info.error = info.message.stack || info.message.toString();
-            info.message = info.message.message;
+        if (info.error instanceof Error) {
+            info.error = info.error.stack || info.error.toString();
         }
-
         if (!info.message) {
-            info.message = stringify(info, null, 2, function () { return undefined; });
+            info.message = stringify(info, null, 2, function() { return undefined; });
         }
 
         const { level, message, index_meta, ...meta } = info;
-
         const opts = {
-            level
-            , index_meta: index_meta !== undefined ? index_meta : this.index_meta
-            , meta: meta || {}
+            level: level
+            , index_meta: typeof info.index_meta === 'boolean' ? index_meta : this.index_meta
+            , context: meta || {}
         };
-
-        this.logger.log(info.message, opts);
-        if (callback) { callback(); }
-    }
-
-    // make sure all logs are flushed when the Stream closes
-    // https://nodejs.org/api/stream.html#stream_writable_final_callback
-    _final(cb) {
-        logdna.flushAll(cb);
+        this.logger.log(message, opts);
+        if (callback) { callback(null, true); }
     }
 };

package.json

@@ -1,6 +1,6 @@
 {
   "name": "logdna-winston",
-  "version": "2.0.0",
+  "version": "2.1.0",
   "description": "LogDNA's Node.js logging module with support for Winston",
   "main": "index.js",
   "scripts": {